The objectives of this study is to evaluate the total runoff yield, peak flow and peak flow travel time depending on the urbanization, return period and rainfall patterns at the downstream of Manchon urban watershed in TaeGu City. SWMM(Storm Water Management Model) is used for runoff analysis based on 5 different steps of urbanization and 4 different types of Huff`s quartile according to 8 return periods. It is analyzed that the order of total runoff yield according to rainfall patterns is Huff`s 4, Huff`s 2. Huff`s 3 and Huff`s 1 quartile, that of peak flow magnitude is Huff`s 2, Huff`s 1, Huffs`4 and Huff`s 3 quartile at present development ratio. under the 60, 70, 80 and 90% of urbanization to the 50% of urbanization by means of the rainfall patterns, the mean increasing ratio of total runoff yield for each case is 4.55, 11.43, 16.07 and 20.02%, that of peak flow is 5.82, 13.61, 17.15 and 18.83%, the mean decreasing ratio of peak flow travel time is 0.00, 2.44, 5.07, and 6.26%, the mean increasing ratio of runoff depth is 4.51, 11.42, 16.02 and 20.05%, respectively. the mean increasing ratio of total runoff yield by means of each return period & Huff`s 3 quartile is 4.86, 12.11, 17.14 and 21.56%, that of peak flow is 5.89, 13.97, 17.82 and 19.71%. Therefore, as the result of this study, it can be used for principal data as to storm sewage treatment and flood damage protection planning in urban small watershed.

본 연구에서는 유역의 크기와 형상 및 도시화 정도가 다른 동수천유역과 무심천의 청주 시험유역, 두 곳을 대상으로 ILLUDAS 모형과 SWMM 모형을 적용한 유출특성을 바탕으로 각 매개변수의 민간도 정도를 분석하였다. 총 유출량비는 선정 매개변수 대부분 강우지속기간과 유역면적크기에 따라서 일정한 관계가 있는 것으로 분석되었으며 강우의 시간적 분포형변화에는 관계성이 약한 것으로 분석되었다. 첨두유출량비는 ILLUDAS 모형에서는 침투능과 매개변수 모두 일

본 연구에서는 새로운 무차원값을 제시하여 도시유출모형의 매개변수결정을 위한 상대적인 민감도분석을 실시하여 매개변수별 민감도특성을 구명하였다. 민감도분석을 위한 무차원값으로 총유출량비,첨두유출량비, 유출민감도비, 민감도비율을 다음과 같이 개발하였다. 유역면적의 크기와 강우분포형과 강우지속기간별로 각 적용단계별 총유출량비, 첨두유출량비, 유출민감도를 산정하기 위해 ILLUDAS모형과 SWMM모형의 매개변수를 선저하고 적정 적용범위를 결정하였다.

To predict diffusion and movement of air pollutants in coastal urban region a numerical simulation shoud be consider atmospheric flow field with land-sea breeze, mountain-valley wind and urban effects. In this study we used Lagrangian particle dispersion method in the atmospheric flow field of Pusan coastal region to depict diffusion and movement of the pollutants emited from particular sources and employed two grid system, one for large scale calculating region with the coarse mesh grid (CMG) and the other for the small region with the fine mesh grid (FMG). It was found that the dispersion pattern of the pollutants followed local circulation system in coastal urban area and while air pollutants exhausted from Sasang moved into Baekyang and Jang moutain, air pollutants from Janglim moved into Hwameong-dong region.

The city's countryside is adjusting to change by urbanization. The recent changes in rural landuse and damages of local landscape characteristics are very serious. But, few studies address the relationship between land-use and quality of landscape for these area. The aim of this study is to clarify causes and problems of the change through investigating changes of landscape as a function of land-use. The results are as follows 1) The change of landscape can be seen as a functional of land-use. Landscapes are characterized by changes of regional environments. These are the urban-rural fringe area which need special consideration for urban development and also for rural landscape quality. 2) 11 types of landscape patterns are found for landscape management. these are Regional commercial area, Apartment development, Recreation & seisure, Golfs, Housing complex, Industrial complex, Vinyl house, Rural village, Evaded facilities, Rivers, Cultural heritages. These landscape types are explained as 'stimuli-responses model'in Bryant's Forces of urbanization. 3) The policy implications of these study are as follows : First is the necessity of landscape management in Grown Management Zone and Natural Reserved Zone in the Metropolitan level, Second is the necessity of development control in semi- agricultural area. The last is the necessary of long range management plan in the urban-rural fringe area.

In the Atmosphere under the various physical and chemical condition different chemical reactions occur and there are a number of air pollutants which are generated by photochemical reaction by absorbing solar energy. Therefor various testing simulation was done as foundation work to develop the numerical model for the prediction of concentration of air pollutants. It was shown change of major air pollutants concentration in according to variation of photodissociation speed constant, K_1 and initial condition of air pollutants concentration which plays major role in photochemical reaction. The photochemical reaction model which was used in this study is found to be useful for understanding relationship among the concentration of reacting air pollutants and the prediction of concentration of air pollutants in urban atmosphere

Pusan has experienced some different paths of urbanization and industrialization compared to other cities, and has faced the problem of over-saturation in environmental capacity. Pusan needs to find out sustainable development strategies based on Agenda 21 by UNCED in 1992 to secure urban renewal. Therefore, Pusan`s sustainable development strategies focus on the 1)research on environmental capacity and reasonable population accommodation 2)supply of basic environmental facilities for the human settlement 3)protection and efficient management of environmental pollution 4)saving and control of energy and other resources 5)independent and stable execution of plan based on biological relation 6)harmony between nature and urban spatial organization. In addition, these policies can be suggested along with the conclusions; First, establishment of green plan-middle and long term environmental goals included in the urban planning to reduce environmental deterioration and pollution. Second, computation of sustainability index-the index is necessary to sustainable urban development, which is related with green GNP of the national level. Third, capacity estimation of nature and social environment-estimation of environmental capacity to the civilized area is required become an ecopolis, and is required to focus on the western area of Pusan which has high degree of potentiality.

본 논문은 도시유역에서의 강우-유출을 해석하기 위한 설계조건으로서 강우 공간분포와 소유역의 분할이 결과치에 미치는 영향을 9개 도시유역에 대하여 SWMM으로 평가한 것이다. 도시유역을 상류 2개 권역으로 구분하는 각각 Huff의 4개 분포형을 조합하여 적용한 결과는 기존의 Huff2 분포로 균일하게 적용한 경우보다 첨두유량에서 -54.68~18.77% 의 편차를 보여주었다. 따라서 설계홍수량산정에서는 공간분포의 고려는 홍수위험도의 경감에 기여할 것으로

본 연구는 강우로 인한 도시 배수구역에서의 유출 및 수질 산정을 위한 주요인자들이 모의해석 결과치에 주는 영향을 분석하였다. 적용대상유역으로서 남가좌, 산본 배수구역과 미국의 Gray Haven, Kings Creek 배수구역 등의 4개 지역을 선택하였다. 실측치를 토대로 각 영향인자들의 최적치를 주요 유역영향인자들을 포괄적으로 수용하고 있는 SWMM모형으로 산정하고, 이를 기준값으로 하여 이들이 계산 결과치에 주는 민감도를 분석하였다. 유출영향 인자로